A planet thought to be the real-life equivalent of Spock's homeworld Vulcan might not actually exist after all.
China's answer to the X-37B is doing something in Earth's orbit and nobody is quite sure what that might be.
Luring inquisitive extraterrestrials to our planet using nuclear radiation seems like a bit of a shot in the dark.
A type of rare, though extremely energetic and deadly cosmic event is able to wipe out whole planets.
A gas discovered in the atmosphere of this distant extrasolar planet is 'only produced by life', say scientists.
A team of planetary scientists has found new evidence of an undiscovered planet in the outer solar system.
The SpaceX CEO has some ambitious plans to build a thriving city on the Red Planet within as little as 20 years.
Rumors have swirled for years around the development of a new type of hypersonic reconnaissance aircraft.
The details of the vehicle's latest mission are top secret, but that hasn't stopped an amateur astronomer from locating it.
Astronomers have identified a potentially habitable extrasolar planet situated around 137 light-years away.
An undersea mapping firm has captured a sonar image that is thought to show the late aviator's plane.
Samples collected from Jezero crater may contain fossil evidence of ancient microbial life on the Red Planet.
Declassified government documents suggest that a lack of UFO tracking represents a threat to national security.
NASA's decade-old rover recently spotted something rather familiar while trundling across the surface of the Red Planet.
The futuristic aircraft can reach supersonic speeds without producing deafening sonic booms.
After several delays earlier this month, the enigmatic vehicle has finally headed back into space atop a SpaceX Falcon Heavy rocket.
The object was captured on camera during a livestream of aircraft activity over Los Angeles International Airport (LAX).
The launch marks the third trip into space for the Chinese reusable experimental spacecraft.
A groundbreaking new study has indicated that there could be habitable salt glaciers situated beneath the planet's surface.
Lt Warren Singer's plane had disappeared without a trace during an attack on Italian airfields in 1943.